Linux Security Lead

Millennium Group

$100K — $130K *
Information Technology
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • 8+ years of experience with Unix/Linux systems.
  • Expertise in SSSD configuration and Linux authentication.
  • Strong knowledge of Kerberos, LDAP, and AD integration.
  • Experience with RHEL, CentOS, and Ubuntu distributions.
  • Proficient in PAM stack configuration and management of sudo policies.
  • Hands-on troubleshooting of authentication and domain issues.
  • Familiarity with Linux hardening and endpoint privilege management.

Responsibilities

  • Lead configuration and troubleshooting for SSSD and Linux authentication.
  • Manage integration of identity systems with Kerberos, LDAP, and Microsoft AD.
  • Implement and evaluate PAM stack for secure access control.
  • Develop and maintain sudo policies and privilege management systems.
  • Provide support for complex authentication service issues in a large enterprise.
  • Conduct baseline hardening of Linux systems to enhance security.
  • Automate processes using scripting languages like Bash, Ansible, or Python.

Benefits

  • Remote work flexibility.
  • Opportunity to lead in a complex enterprise environment.
  • Access to advanced tools and technologies in security.
  • Exposure to large-scale identity and access management systems.
  • Opportunity for professional growth in a senior engineering role.
Full Job Description
Lead Unix/Linux Engineer - Remote

We are seeking a Lead Unix/Linux Engineer with 8+ years of experience to support secure OS-level authentication, enterprise identity integrations, privilege models, and Linux baseline hardening across a large, complex enterprise environment.
The ideal candidate will have strong hands-on experience with SSSD, Linux authentication, Kerberos, LDAP, Microsoft Active Directory integration, PAM, sudo policies, and automation.
Required Skills - 8+ Years
  • Strong hands-on experience configuring and troubleshooting System Security Services Daemon (SSSD), Linux authentication and enterprise identity integration
  • Strong hands-on experience with Kerberos, LDAP, and Microsoft Active Directory (AD) integration
  • Experience with RHEL, CentOS, and Ubuntu
  • Experience configuring PAM stack
  • Experience managing sudo policies and Linux privilege models
  • Ability to troubleshoot:
    • Authentication failures
    • Caching issues
    • Domain join problems
    • Cross-realm trust issues
  • Familiar with Linux baseline hardening and secure access patterns
  • Knowledge of secure OS-level authentication and access-control patterns
  • Familiar with Endpoint Privilege Management solutions
  • Automation and scripting experience with one or more of the following:
    • Bash
    • Ansible
    • Puppet
    • Python
  • Ability to support identity and authentication services in a large, complex enterprise environment
Preferred Skills
  • Experience supporting enterprise IAM or privileged-access-management programs
  • Previous experience operating in a lead or senior engineering role

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